JP2002157848A - Swing arm assembly for magnetic disk device - Google Patents
Swing arm assembly for magnetic disk deviceInfo
- Publication number
- JP2002157848A JP2002157848A JP2000354442A JP2000354442A JP2002157848A JP 2002157848 A JP2002157848 A JP 2002157848A JP 2000354442 A JP2000354442 A JP 2000354442A JP 2000354442 A JP2000354442 A JP 2000354442A JP 2002157848 A JP2002157848 A JP 2002157848A
- Authority
- JP
- Japan
- Prior art keywords
- diameter portion
- arm
- housing
- swing arm
- bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Mounting Of Bearings Or Others (AREA)
- Moving Of Heads (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば、磁気ディ
スク装置におけるスイングアーム用の軸受装置のよう
に、高速で微小揺動する部位に使用して好適な転がり軸
受を組付けた磁気ディスク装置用スイングアーム組立体
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive having a rolling bearing which is suitable for use in a high-speed micro-oscillation part, such as a swing arm bearing in a magnetic disk drive. The present invention relates to a swing arm assembly.
【０００２】[0002]
【従来の技術】例えば、従来のスイングアーム用軸受装
置では、図９又は図１０のように、グリースが密封され
た玉軸受１００，１００に予圧をかけて使用されてお
り、アーム（Ｅブロック）２００は、ハウジング３００
の外径部３０１の中央部一箇所にボルト４００止めされ
ている。図９はハウジング外径部３０１にボルト４００
をねじ込んでハウジング３００を引張ってアーム２００
に締結固定されるタイプ、図１０はハウジング外径部３
０１にボルト４００を押し付けてアーム２００に締結固
定されるタイプを示す。2. Description of the Related Art For example, in a conventional swing arm bearing device, as shown in FIG. 9 or FIG. 10, grease is used by applying a preload to a sealed ball bearing 100, 100, and an arm (E block) is used. 200 is a housing 300
The bolt 400 is fixed to one central portion of the outer diameter portion 301 of the first embodiment. FIG. 9 shows a bolt 400 attached to the housing outer diameter portion 301.
Into the arm 200 by pulling the housing 300
10 is a type that is fastened and fixed to the housing.
1 shows a type in which a bolt 400 is pressed against 01 and fastened and fixed to the arm 200.
【０００３】[0003]
【発明が解決しようとする課題】最近、磁気ディスク装
置はますます高密度化が要求されている。このため、デ
ィスクに信号を記録するトラックの幅はますます狭くな
ってきており、信号を記録再生するヘッドを搭載するス
イングアームには、目標トラックへのアクセスの高速化
と位置決め性能の高精度化が要求されている。Recently, there has been a demand for higher density magnetic disk drives. For this reason, the width of the track for recording signals on the disk is becoming increasingly narrower, and the swing arm equipped with a head for recording and reproducing signals has faster access to the target track and higher positioning performance. Is required.
【０００４】従って、制御の高速化と高精度化を満足す
るために、スイングアームを支持する玉軸受には低トル
ク、低トルク変動であることが要求されている。しか
し、従来のスイングアーム用軸受装置では、アーム２０
０はハウジング外径部３０１の中央部一箇所でボルト４
００により締結されているが、ハウジング外径部３０１
とアーム内径部２０１の反力によって、軸受１００に外
力が作用して外輪溝形状が変化し、トルク変動が生じて
トルクが大きくなるという問題があった。[0004] Therefore, in order to satisfy high-speed and high-precision control, ball bearings supporting a swing arm are required to have low torque and low torque fluctuation. However, in the conventional swing arm bearing device, the arm 20
0 is a bolt 4 at one central portion of the housing outer diameter portion 301.
00, the outer diameter portion 301 of the housing.
Due to the reaction force of the arm inner diameter portion 201, an external force acts on the bearing 100 to change the shape of the outer ring groove, and there is a problem that torque is increased and torque is increased.
【０００５】本発明は従来技術の有するこのような問題
点に鑑みなされたものであり、その目的とするところ
は、トルク変動を低減し、低トルクの磁気ディスク装置
用スイングアーム組立体を提供することである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a swing arm assembly for a magnetic disk drive with reduced torque fluctuation and low torque. That is.
【０００６】[0006]
【課題を解決するための手段】上記課題を達成するため
に、本発明がなした技術的手段は、固定軸に対して転が
り軸受によって回転可能に支持されたハウジングの外径
部又はアームの内径部（Ｅブロック）の少なくともいず
れか一方の軸受部分に、逃げを設けたことである。In order to achieve the above-mentioned object, the technical means of the present invention is to provide an outer diameter portion of a housing or an inner diameter of an arm rotatably supported by a rolling bearing with respect to a fixed shaft. A relief is provided in at least one of the bearing portions of the portion (E block).
【０００７】[0007]
【発明の実施の形態】以下、本発明の一実施形態を図に
基づいて説明する。図１および図２は第一実施形態、図
３および図４は第二実施形態、図５および図６は第三実
施形態を夫々示す。なお、各実施の形態は、本発明の一
実施形態を説明するために挙げた具体的形態であって、
特に図示形態に限定して解釈されるものではない。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment, FIGS. 3 and 4 show a second embodiment, and FIGS. 5 and 6 show a third embodiment, respectively. Note that each embodiment is a specific form described for describing one embodiment of the present invention,
In particular, it should not be interpreted as being limited to the illustrated form.
【０００８】第一実施形態は、二個の転がり玉軸受１，
１がハウジング２及び固定軸１２に接着固定されると共
に、ハウジング外径部３の中央一箇所にボルト５を押し
付けてアーム（Ｅブロック）６に締結固定され、上記固
定軸１２に対してハウジング２およびアーム（Ｅブロッ
ク）６が回転可能に支持されているＨＤＤ（Hard Disk
Drive）等の磁気ディスク装置用スイングアーム組立
体の一実施形態を示し、本実施形態では、上記ハウジン
グ外径部３の軸受部分位置１０に段差（逃げ）１１を設
けている。In the first embodiment, two rolling ball bearings 1,
1 is adhered and fixed to the housing 2 and the fixed shaft 12, and a bolt 5 is pressed to one central portion of the housing outer diameter portion 3 and fastened and fixed to an arm (E block) 6. (Hard Disk) in which the arm (E block) 6 is rotatably supported.
One embodiment of a swing arm assembly for a magnetic disk device such as a drive (drive) is shown. In this embodiment, a step (escape) 11 is provided at a bearing portion position 10 of the housing outer diameter portion 3.
【０００９】段差（逃げ）１１は、ハウジング外径部３
の軸受部分位置１０を周方向に連続形成して構成されて
いる。該段差１１の軸方向幅（段差長さ）・径方向幅
（段差深さ）は本発明の範囲内で適宜設定される。The step (escape) 11 is formed in the housing outer diameter portion 3.
Are formed continuously in the circumferential direction. The axial width (step length) and the radial width (step depth) of the step 11 are appropriately set within the scope of the present invention.
【００１０】本実施形態では、転がり玉軸受１，１がハ
ウジング２及び固定軸１２に接着固定されている例を示
すが、転がり玉軸受１，１はハウジング２および固定軸
１２に圧入固定されてもよく、本発明の範囲内で適宜選
択可能である。なお、固定軸１２・アーム（Ｅブロッ
ク）６・転がり玉軸受１は、本発明の範囲内において周
知の構成が適宜選択使用され、特に限定解釈されるもの
ではない。In this embodiment, an example is shown in which the rolling ball bearings 1 and 1 are adhesively fixed to the housing 2 and the fixed shaft 12, but the rolling ball bearings 1 and 1 are press-fitted and fixed to the housing 2 and the fixed shaft 12. May be appropriately selected within the scope of the present invention. As the fixed shaft 12, the arm (E block) 6, and the rolling ball bearing 1, well-known configurations are appropriately selected and used within the scope of the present invention, and are not particularly limited.
【００１１】本実施形態によれば、ハウジング外径部３
とアーム内径部７との反力は、ハウジング外径部３の軸
受部分位置１０に設けた段差（逃げ）１１により直接軸
受１，１には伝わらず、軸受１，１に作用する外力は低
減される。このため、軸受１，１の外輪の変形および外
輪軌道溝の変形は生じなくなり、トルク変動は低減化で
きる。According to this embodiment, the housing outer diameter portion 3
The reaction force between the arm and the inner diameter portion 7 is not directly transmitted to the bearings 1 and 1 by the step (relief) 11 provided at the bearing portion 10 of the housing outer diameter portion 3, and the external force acting on the bearings 1 and 1 is reduced. Is done. Therefore, deformation of the outer ring of the bearings 1 and 1 and deformation of the outer ring raceway groove do not occur, and torque fluctuation can be reduced.
【００１２】図７は図１に示す第一実施形態の効果を示
す温度変化によるトルク変化の測定データである。これ
を、図８に示す従来技術の測定データと比すると、本実
施形態はトルク変動を低減化し、低トルク化されている
ことが確認できる。FIG. 7 shows measured data of torque change due to temperature change showing the effect of the first embodiment shown in FIG. Comparing this with the measurement data of the prior art shown in FIG. 8, it can be confirmed that the present embodiment has reduced torque fluctuation and reduced torque.
【００１３】第二実施形態は、二個の転がり玉軸受１，
１がハウジング２及び固定軸１２に接着固定されると共
に、アーム（Ｅブロック）外径部８の中央一箇所からハ
ウジング外径部３にボルト５をねじ込み、ハウジング２
を引張ってアーム６に締結固定され、上記固定軸１２に
対してハウジング２およびアーム（Ｅブロック）６が回
転可能に支持されているＨＤＤ（Hard Disk Drive）
等の磁気ディスク装置用スイングアーム組立体の一実施
形態を示し、本実施形態では、上記第一実施形態と同様
に上記ハウジング外径部３の軸受部分位置１０に段差
（逃げ）１１を設けている。In the second embodiment, two rolling ball bearings 1,
1 is adhesively fixed to the housing 2 and the fixed shaft 12, and a bolt 5 is screwed into the housing outer diameter portion 3 from one central portion of the arm (E-block) outer diameter portion 8.
HDD (Hard Disk Drive) in which the housing 2 and the arm (E block) 6 are rotatably supported on the fixed shaft 12 by pulling
An embodiment of a swing arm assembly for a magnetic disk device, such as the above, is shown. In this embodiment, a step (escape) 11 is provided at a bearing portion position 10 of the housing outer diameter portion 3 as in the first embodiment. I have.
【００１４】その他の構成及び作用効果は、上記第一実
施形態と同様で同一箇所に同一符号を付してその説明を
省略する。The other constructions and functions and effects are the same as those of the first embodiment, and the same parts are denoted by the same reference numerals and description thereof will be omitted.
【００１５】第三実施形態は、第一実施形態・第二実施
形態と異なり、アーム（Ｅブロック）６の内径部７の軸
受部分位置１０に段差（逃げ）１１を設けている。The third embodiment differs from the first and second embodiments in that a step (escape) 11 is provided at a bearing portion position 10 of an inner diameter portion 7 of an arm (E block) 6.
【００１６】段差（逃げ）１１は、アーム内径部７の軸
受部分位置１０を周方向に連続形成して構成されてい
る。該段差１１の軸方向幅（段差長さ）・径方向幅（段
差深さ）は本発明の範囲内で適宜設定される。その他の
構成及び作用効果は、上記第一実施形態と同様で同一箇
所に同一符号を付してその説明を省略する。The step (relief) 11 is formed by continuously forming a bearing portion position 10 of the arm inner diameter portion 7 in the circumferential direction. The axial width (step length) and the radial width (step depth) of the step 11 are appropriately set within the scope of the present invention. The other configuration and operation and effect are the same as those of the first embodiment, and the same portions are denoted by the same reference numerals and description thereof is omitted.
【００１７】上記第一実施形態・第二実施形態と同様
に、ハウジング外径部３とアーム内径部７との反力は、
この段差（逃げ）１１を設けたことにより、直接軸受
１，１には伝わらず、軸受１，１に作用する外力は低減
される。また、第二実施形態と同様にハウジング２にボ
ルト５をねじ込んで引張り、アーム６に締結固定するタ
イプにおいて、本実施形態のようにアーム内径部７に段
差(逃げ)１１を形成することも本発明の範囲内である。As in the first and second embodiments, the reaction force between the housing outer diameter portion 3 and the arm inner diameter portion 7 is:
By providing the step (relief) 11, the external force acting on the bearings 1, 1 without being directly transmitted to the bearings 1, 1 is reduced. Further, as in the second embodiment, in the type in which the bolt 5 is screwed into the housing 2 to be pulled and fastened and fixed to the arm 6, it is also possible to form a step (escape) 11 in the arm inner diameter portion 7 as in this embodiment. Within the scope of the invention.
【００１８】なお、上記第一実施形態乃至第三実施形態
では、夫々ハウジング外径部３とアーム内径部７のいず
れか一方にのみ段差１１を構成しているが、各実施形態
においてハウジング外径部３とアーム内径部７の双方に
段差を構成するものであっても本発明の範囲内であり、
適宜実施の形態に応じて選択される。In the first to third embodiments, the step 11 is formed on only one of the outer diameter portion 3 of the housing and the inner diameter portion 7 of the arm. Even if a step is formed in both the part 3 and the arm inner diameter part 7, it is within the scope of the present invention,
It is appropriately selected according to the embodiment.
【００１９】[0019]
【発明の効果】本発明によると、ハウジングの外径部又
はアーム（Ｅブロック）の内径部の少なくともいずれか
一方の軸受部分位置に、段差（逃げ）を設け、軸受に作
用する外力を小さくして、トルク変動を低減化し、低ト
ルク化できることから、位置決め性能の高精度化を図る
ことができる。According to the present invention, a step (escape) is provided at at least one of the bearing portion of the outer diameter portion of the housing and the inner diameter portion of the arm (E block) to reduce the external force acting on the bearing. As a result, the torque fluctuation can be reduced and the torque can be reduced, so that the positioning performance can be made more precise.
【図１】本発明の第一実施形態を示す概略縦断面図。FIG. 1 is a schematic longitudinal sectional view showing a first embodiment of the present invention.
【図２】要部を拡大して示す断面図。FIG. 2 is an enlarged sectional view showing a main part.
【図３】本発明の第二実施形態を示す概略縦断面図。FIG. 3 is a schematic longitudinal sectional view showing a second embodiment of the present invention.
【図４】要部を拡大して示す断面図。FIG. 4 is an enlarged sectional view showing a main part.
【図５】本発明の第三実施形態を示す概略縦断面図。FIG. 5 is a schematic longitudinal sectional view showing a third embodiment of the present invention.
【図６】要部を拡大して示す断面図。FIG. 6 is an enlarged sectional view showing a main part.
【図７】本発明の温度変化によるトルク変化の測定デー
タを示す図。FIG. 7 is a diagram showing measured data of a torque change due to a temperature change according to the present invention.
【図８】従来技術の温度変化によるトルク変化の測定デ
ータを示す図。FIG. 8 is a diagram showing measured data of a torque change due to a temperature change according to the related art.
【図９】従来技術を示す概略縦断面図。FIG. 9 is a schematic vertical sectional view showing a conventional technique.
【図１０】従来技術を示す概略縦断面図。FIG. 10 is a schematic vertical sectional view showing a conventional technique.
１：転がり玉軸受 ２：ハウジング ３：ハウジング外径部 ５：ボルト ６：アーム（Ｅブロック） ７：アーム内径部 １０：軸受部分位置 １１：段差（逃げ） １２：固定軸 1: Rolling ball bearing 2: Housing 3: Housing outer diameter part 5: Bolt 6: Arm (E block) 7: Arm inner diameter part 10: Bearing part position 11: Step (relief) 12: Fixed shaft
───────────────────────────────────────────────────── フロントページの続き (72)発明者 角田 吉郎 神奈川県藤沢市宮前645番地エヌエスケ ー・マイクロプレシジョン株式会社内 Ｆターム(参考） 3J017 AA01 CA01 CA06 DB01 5D068 AA01 BB02 CC11 EE18 GG07 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoshiro Tsunoda 645 Miyamae, Fujisawa-shi, Kanagawa NSK Micro Precision Co., Ltd. F-term (reference) 3J017 AA01 CA01 CA06 DB01 5D068 AA01 BB02 CC11 EE18 GG07
Claims (1)
能に支持されたハウジングの外径部又はアームの内径部
の少なくともいずれか一方の軸受部分に、逃げを設けた
ことを特徴とする磁気ディスク装置用スイングアーム組
立体。1. A magnetic disk wherein a relief is provided in at least one of an outer diameter portion of a housing and an inner diameter portion of an arm rotatably supported by a rolling bearing with respect to a fixed shaft. Swing arm assembly for equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000354442A JP4328461B2 (en) | 2000-11-21 | 2000-11-21 | Swing arm assembly for magnetic disk drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000354442A JP4328461B2 (en) | 2000-11-21 | 2000-11-21 | Swing arm assembly for magnetic disk drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002157848A true JP2002157848A (en) | 2002-05-31 |
| JP4328461B2 JP4328461B2 (en) | 2009-09-09 |
Family
ID=18827027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000354442A Expired - Fee Related JP4328461B2 (en) | 2000-11-21 | 2000-11-21 | Swing arm assembly for magnetic disk drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4328461B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109014A (en) * | 2009-12-24 | 2011-06-29 | 美蓓亚株式会社 | Bearing device and swing arm assembly for magnetic disk |
-
2000
- 2000-11-21 JP JP2000354442A patent/JP4328461B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109014A (en) * | 2009-12-24 | 2011-06-29 | 美蓓亚株式会社 | Bearing device and swing arm assembly for magnetic disk |
| JP2011134379A (en) * | 2009-12-24 | 2011-07-07 | Minebea Co Ltd | Bearing device and swing arm assembly for magnetic disk |
| US8947832B2 (en) | 2009-12-24 | 2015-02-03 | Minebea Co., Ltd. | Bearing device and swing arm assembly for magnetic disk |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4328461B2 (en) | 2009-09-09 |
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